>John Polgar wrote:
>A more modern method would be a piece of flex ply.
 

>Rick Bertrand wrote:

>I have never seen this product. There is not a supplier
>in my area. But it sounds like a good idea.

John Polgar replies:

Photo attached of it.  Kerfcore this one is called.
You can order a sheet online at:
http://www.qualityplywoodspec.com/

But these guys have not performed well at service for small

clients.  That has been my personal experience and they are

local!  You might find it at a local vendor or other online

provider.

John Polgar
Clearwater, FL